Maxwell Render | Official public forum

option to add many map for reflctance ; displacement ; bump ; mask ....etc
and for each map we can use blending mode : like in photoshop

we DEFINITELY need that for displacement. as it is right now, you can do multiple maps for colors with additional BDSF (albeit only as additive mode) except for displacement, which doesn't even have a work around. Your setup is nice looking though, and I would gladly welcome it.

multi map very useful if we want modify part of object or create density map for grass without using photoshop
and if the maxwell team add uv channel editor for grass maps is very good